... to reinforce cement, plastic, bitumen,plaster, marble, mosaics, roofing, interior and exterior walls, and in otherindustrial applications. Specifications:Opening Sizes: 3x3mm, 4x4mm, 4x5mm, 5x5mm ... used to reinforce cement, plastic, bitumen,plaster, marble, mosaics, roofing, interior and exterior walls, and in otherindustrial applications.Special specification and package can be made.